Scissor knife



FIG. 1 is a left side perspective view of the scissor knife open showing my new design;

FIG. 2 is a right side perspective view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side perspective view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof.

FIG. 7 is a front view thereof; and,

FIG. 8 is a rear view thereof. 

The ornamental design for a scissor knife, as shown and described. 